Saw this in person, today
The original owner of the rehabbed house died in December at 89. One of the sellers was there today, and explained that the mantelpiece in the LR is assembled from bits and pieces of the ruins of fireplaces upstairs.
The staircase from the 2nd to 3rd floor was beautifully intact Federal. (Benign neglect during the barroom era).
The seller explained that there was a near immediate offer on the house by someone who wanted to remove the Magaziner staircase and other elements, but the offer fell through. (To me, he seemed relieved).